duplicant starve to death with positive calories

There was stress reaction -4000 kcal per cycle. When I notice label "starvation" she has 16 kcal, and I was pretty sure that's it. But she take surf'n'turf from nowhere (I did not understand where it was located), and amount of calories grow to 460. Then she walk a little, calories fall down to 300, stress fall down from 100 to 60, she pee in pants and die from starvation (or shame).